Fig. 3

Double-periodic soliton (30) with different parameters of (The first row): Case (19) \(z=t=1\), (The second row): Case (19) \(y=t=1\) and (The third row): Case (19) \(x=t=1\).
Double-periodic soliton (30) with different parameters of (The first row): Case (19) \(z=t=1\), (The second row): Case (19) \(y=t=1\) and (The third row): Case (19) \(x=t=1\).